kernel.git/arch/sh/kernel/process.c, branch linux-2.6.21.y

sh: Fix kernel thread stack corruption with preempt.

2007-03-05T05:13:26Z

When I run a preemptive kernel-2.6.20 for SH7780, a created kthread(pdflush) can not exit by do_exit() in kernel_thread_helper. I think that the created kthread should have a room for 'struct pt_regs' space on the stack top, because __switch_to() will refer to the space as follows using 'regs = task_pt_regs(prev)' and next condition may be true. Signed-off-by: Hideo Saito Signed-off-by: Paul Mundt

sh: Fixup cpu_data references for the non-boot CPUs.

2007-02-13T01:54:45Z

There are a lot of bogus cpu_data-> references that only end up working for the boot CPU, convert these to current_cpu_data to fixup SMP. Signed-off-by: Paul Mundt

sh: Use a per-cpu ASID cache.

2007-02-13T01:54:45Z

Previously this was implemented using a global cache, cache this per-CPU instead and bump up the number of context IDs to match NR_CPUS. Signed-off-by: Paul Mundt

sh: Use a jump call table for debug trap handlers.

2007-02-13T01:54:43Z

This rips out most of the needlessly complicated sh_bios and kgdb trap handling, and forces it all through a common fast dispatch path. As more debug traps are inserted, it's important to keep them in sync for all of the parts, not just SH-3/4. As the SH-2 parts are unable to do traps in the >= 0x40 range, we restrict the debug traps to the 0x30-0x3f range on all parts, and also bump the kgdb breakpoint trap down in to this range (from 0xff to 0x3c) so it's possible to use for nommu. Optionally, this table can be padded out to catch spurious traps for SH-3/4, but we don't do that yet.. Signed-off-by: Paul Mundt

sh: Fix get_wchan().

2006-12-11T23:42:08Z

Some time ago the schedule frame size changed and we failed to reflect this in get_wchan() at the time. This first popped up as a problem on SH7751R where schedule_frame ended up being unaligned and generating an unaligned trap. This fixes it up again.. Signed-off-by: Paul Mundt

sh: BUG() handling through trapa vector.

2006-12-11T23:42:08Z

Previously we haven't been doing anything with verbose BUG() reporting, and we've been relying on the oops path for handling BUG()'s, which is rather sub-optimal. This switches BUG handling to use a fixed trapa vector (#0x3e) where we construct a small bug frame post trapa instruction to get the context right. This also makes it trivial to wire up a DIE_BUG for the atomic die chain, which we couldn't really do before. Signed-off-by: Paul Mundt

sh: gcc4 support.

2006-12-06T01:45:38Z

This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: Stuart Menefy Signed-off-by: Paul Mundt

sh: Proper show_stack/show_trace() implementation.

2006-10-19T07:30:31Z

This splits out some of the previous show_stack() implementation which was mostly doing the show_trace() work without actually dumping any of the stack contents. This now gets split in to two sections, where we do the fetching of the stack pointer and subsequent stack dumping in show_stack(), while moving the call trace in to show_trace(). Signed-off-by: Paul Mundt

sh: SH-4A UBC support

2006-10-12T03:16:13Z

A simple patch to enable the UBC on SH-4A. Signed-off-by: Ryusuke Sakato Signed-off-by: Paul Mundt

sh: Initial vsyscall page support.

2006-09-27T09:33:49Z

This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt